It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs; germs produce acid, and acid hurts your teeth and gums. Flossing (使用牙线) helps to remove the food that gets stuck between your teeth. This explains why flossing helps to keep your mouth healthy, but some doctors say that flossing can also be good for your heart.

    It may seem strange that something you do for your teeth can have any effect on your heart. Doctors have come up with a few ideas about how flossing works to keep your heart healthy. One idea is that the germs that hurt your teeth can leave the mouth and travel into your blood.Germs that get into the blood can then attack your heart. Another idea is based on the fact that when there are too many germs in your mouth, the body tries to fight against there germs. For some reason, the way the body fights these mouth germs may end up weakening the heart overtime.

    Not every doctor agrees about these ideas. Some doctors think that the link between good flossing habits and good heart health is only a coincidence. The incidence (发生率) of two or more events is completely random, as they do not admit of any reliable cause and effect relationship between them. For example, every time I wash my car, it rains. This does not mean that when I wash my car, I somehow change the weather. This is only a coincidence. Similarly, some doctors think that people who have bad flossing habits just happen to also have heart problems, and people who have good flossing habits just happen to have healthy hearts.

    The theory that flossing your teeth helps to keep your heart healthy might not be true. But every doctor agrees that flossing is a great way to keep your teeth healthy. So even if flossing does not help your heart, it is true to help your teeth. This is enough of a reason for everyone to floss their teeth every day.

    The summer holidays are upon us again. Here is our guide to summer holiday fun in Peterborough!

Peterborough Museum

    The Age of the Dinosaurs' is the museum' s main attraction this summer. Get up close to prehistoric creatures via some great hands-on exhibits! Watch out for monsters lurking (潜伏）around every ember! The museum is open from 10:00 am to 5:00 pm Monday to Saturday, and from 12:00 pm to 4:00 pm on Sundays in August.

Call 01733 864663 for details.

Saxon Youth Club

    School holiday fun: Young people aged 13-19 will be able to produce their own music, compete in spots activities, or try their hand at cooking at Saxon Youth Club, Saxon Community Center, Norman Road, Peterborough every Monday and Wednesday from 3:00 pm. PLUS an aero ball tournament will take place on Thursday, 12^th August between 3:30 pm and 6:30 pm.

Houghton Mill

    Alice through the Looking Class－a new production of the family favorite on Monday, 30^th August. Bring rugs or chairs to sit on and a picnic if you wish to eat during the play. Gates open 5:30 performance 6:30 pm-8:30 pm. Tea room will be open until end of the interval. Adult £10. Child £7. Family £20.

Farmland Museum and Denny Abbey

    Farmland Games: From Wellie Wanging to Pretend Ploughing matches, come and join the Farmland Team. Collect your sporting stickers and create a colorful rosette （玫瑰形饰物）that is fit for a winner! No need to book, just turn up between 12:00 pm and 4:00 pm on Thursday, 19^th August. Suitable for children aged four and above, each child should be accompanied by an adult and all activities are included in the normal admission price. Tickets Cost £7 per child.

For further information, call 01223 810080.

    Teachers love to put students into teams.{#blank#}1{#/blank#} Why? Because they know the responsible team members will come through for a good grade.

If you are teamed up with a student who is lazy, the worst thing you can do is let it get you down.{#blank#}2{#/blank#} and it might create a positive change in your partner!

    Try these tips for working with a slacker(懒虫).

    Be excited and provide a good example. Your slacker may be a good person who has developed bad work habits. You may be able to teach your partner some valuable skills for a successful future.

    Think rewards!{#blank#}3{#/blank#} For instance, you could promise to make cupcakes for the next work meeting and encourage your partner to bring a good snack.

    Make some time to sit with your partner and establish a set of work rules and deadlines. Don't quarrel, though. Make it clear that you would like to establish rules to keep you both on track.{#blank#}4{#/blank#} Keep a record of your rules, your initial meetings, and your work. When it becomes obvious in the records that you're doing all the work, talk with the slacker.{#blank#}5{#/blank#}

A. Don't let the anger and pain defeat you.

B. Come up with a great reward for meeting some goal.

C. Instead, take some steps to encourage your partner to work.

D. Unavoidably one or more members will try to do nothing.

E. Start out by giving your partner a clear task with a deadline.

F. Show him/her the evidence and suggest he or she pick up the pace.

G. Think about the future and the fact that you are going to be rewarded.

Does your school have any problems with discipline? What happens when students step out of line? Here are some examples of bad behaviour:

    Playing truant(missing school without permission from parents).

    Stealing, smoking, hitting, swearing(说脏话), running, kissing.

    Cheating in exams.

    Calling a teacher or another pupil bad names.

    Not doing homework.

    Not listening or not paying attention in lessons.

    Wearing unsuitable clothes.

Here are some of the ways that UK school children can be punished:

Exclusion: a pupil is asked to leave the school and not come back. The pupil has to find a new school or a different method of education.

Suspension: a pupil cannot enter the building or attend lessons until the school has a meeting about their situation. Suspension can last from one to 45 days. The pupil is usually given work to do at home with a special teacher.

Detention: a pupil is asked to stay after school and work for 30—60 minutes before they Can leave.

Lines: a pupil has to write a sentence many times(e.g.100 or more)on a sheet of paper, e, g, “I must not shout in class”.

    Freya MacDonald, a 15-year-old pupil from Scotland, made the news when she refused to accept her school's punishment. Her family says that she was given 11 detentions for trivial things in class and coming into school through a fire door.

Freya says that repeated detentions disrupted her fight to an education under Scottish law and made it difficult for her to learn. She refused to return until the school respected her civil rights. She wants the headmaster and her teachers to sign a letter to promise this. Hundreds of schools in Scotland were told not to use detention as a punishment because of her legal action.

Many UK schools now give parents a home-school contract, explaining their discipline and rules. Parents must sign this document to agree that they accept the school's rules and discipline and that they are responsible for their child's behaviour.

    Fashions have a lot of rules. Most of them, however, are just wrong. But there's one rule that goes beyond tradition and into the field of scientific study of the brain: Black garments are slimming. It all comes down to how your visual system processes the light. The below holes in each square are the same in size, yet the white hole looks bigger than the black hole.

    In the 1500s, Galileo Galilei noticed that some of the planets looked larger when viewed with the naked eye (肉眼) than they did when viewed through a telescope, making the white light of Venus (金星) appear eight to ten times larger than Jupiter (木星) in the night sky. He knew something strange must be going on with his vision to cause this illusion, but he wasn't sure what it was. Luckily, scientists never stopped wondering, and in 2014, they figured it out.

    Our visual system operates via two main channels: "on" neurons (神经元) that are sensitive to light things and "off" neurons that are sensitive to dark things. When it came to the dark "off" neurons, the researchers found that they responded predictably to dark shapes on a light background — the greater the contrast between the two, the more active these neurons were. But the light "on" neurons behaved unpredictably. Even with the same amount of contrast, light objects on a dark background caused a greater response in these neurons.

    This makes some sense, evolutionarily speaking. In the dark of night, you'd want to be able to take in every bit of light you can get, so a visual system that enlarges light objects on a dark background could be very useful. However, it's not that hard to see dark objects in the light of day. It has some effects in the colors of your clothes and in the appearance of the planets—the brighter appearance of Venus in the night sky makes it look bigger than the darker Jupiter.

    Scientists around the world are striving for effective detection of cancer in the early stages, which is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body, and a Chinese scientist may have found a quick way of knowing whether malignant tumors (恶性肿瘤) exist in a patient's body, with just one drop of blood.

    Malignant tumors in early phases can be cured. However, it's extremely difficult to be aware of cancer in its early stages, as patients don't show obvious symptoms and thus it can only be found in its later stages, which is already too late, so to detect cancer early remains a global challenge for scientists.

    Back in 1989, scientists have found a kind of heat shock proteins (HSP), named Hsp90α, which existed in human bodies and can be used as a cancer biomarker detection kit. Scientists around the globe have been working on it since then, and more than 10, 000 journals have been published on accredited magazines, yet no one has actually turned their research results into medical products.

    However, Luo Yongzhang and his team in Tsinghua University's School of Life Sciences in Beijing seemed to have cracked the code, after working on the problem since 2009.The team has produced an artificial Hsp90α protein for clinical use that gains structural stability by regrouping proteins. The test kit can diagnose multiple kinds of cancer by analyzing a drop of human blood. This means they are able to "create" the protein, in any quantity, and at any time they wish to.

    The kit has since been used in clinical trials involving 2, 347 patients at eight hospitals in China. It was the first clinical trial in the world to test if the protein could be a useful tumor biomarker for lung cancer, and it succeeded. Now, the kit has been approved to enter the Chinese and European markets, 24 years after Hsp90α was discovered.